Verification of positions in camera images
AssigneeBrainlab AG
InventorStefan Vilsmeier
Life of this patent
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Abstract
The invention concerns a method for showing three-dimensionally defined fiducial points in a video camera image involving monitoring of a spatial region by at least two cameras which can map invisible light, especially infrared light, and by at least one video camera, computer-assisted analysis of the image data of the cameras, using the three-dimensional data obtained by means of the invisible-light cameras to compute the spatial location of objects located in the monitored spatial region as mapped by the invisible-light cameras, and displaying the fiducial points assigned to the objects together with the video image; the invention also relating to an apparatus for implementing the method or for visually verifying the correct position of an object.
Claims14
A method for providing visual verification of mapped fiducial points on an object with the actual position of the fiducial points in a video image of the object, comprising:
- monitoring a spatial region including the object by at least two cameras which can map invisible light;
- monitoring the spatial region by at least one video camera that produces a video image of the spatial region including the object and in which the fiducial points on the object are visible;
- computing the spatial location of the fiducial points on the object in said monitored spatial region as mapped by said invisible-light cameras;
- and
- showing in overlapping relationship on a display the video image in which the fiducial points on the object are visible and also the fiducial points at their computed spatial locations in the same frame of reference as the video image shown on the display, thereby to enable visual verification of the computed spatial locations of the fiducial points with the positions of the fiducial points in the video image shown on the display.
An apparatus for visually verifying mapped fiducial points on an object with the actual position of the fiducial points in a video image of the object, comprising:
- at least two cameras which map invisible light, for monitoring a spatial region in which said object is located;
- and
- at least one video camera monitoring the spatial region, for producing a video image of the spatial region including the object and in which the fiducial points on the object are visible;
- a computer for computer-assisted mapping, by use of the invisible-light cameras, of the spatial location of the fiducial points on the object in said monitored spatial region into the same frame of reference as the video image when shown on a display;
- and
- a display for showing in overlapping relationship the image of the video camera in which the fiducial points are visible and also the fiducial points at their computed spatial locations in the same frame of reference as the video image shown on the display, thereby to enable visual verification of the computed spatial locations of the fiducial points with the positions for the fiducial points in the video image shown on the display.
Dependencies are inferred from the claim text.